Cab for a tractor



FIG. 1 is a left side and front perspective view of a cab for a tractor showing my new design;

FIG. 2 is an enlarged right side and rear perspective view of the cab for a tractor;

FIG. 3 is a top plan view thereof, the bottom being unornamented;

FIG. 4 is a right side elevation view thereof, the left side elevation view being a mirror image;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken line showing of a tractor or portions thereof in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cab for a tractor, as shown and described. 